In a connector, an optical fibre cable is passed through a sub-assembly comprising a crimp body (6) and collet (5). Then a sub-assembly comprising a threaded shell (4) and ferrule (3) is screwed onto the collet (5) so that its tines (20) are compressed in the ferrule onto the buffer coating (53) of the cable at a location behind an end portion (37) from which the buffer coating has been removed. Thus, the optical fibre passes through a precision hole (19) for its projecting end to be removed by a cleaving blade (73) passed across a slot (22). Two connectors are fixed to opposite ends of a rigid coupler (9) by coupling nuts (1) to bring opposed fibres into register.